I am tempted to connect the 2 amps and phono stage to the 3 regenerated outlets, the AV units to a block off the spare mains socket and the rest of the audio stuff off a block connected to to the conditioned outlet.
Paul McGowan said
If it's a P3 I'd connect the two amps through the high current filtered outlets, everything else through the regenerated outlets.
Thank you Paul. As the P3 only has one conditioned outlet, I will have to use one of the distribution blocks (they are basic audio ones without fuses, switches or filters) to get power to the two amps. I am still using thick power leads for the amplifiers from when I thought these things made a difference. It would be bit stupid running them off a mains block, so I can go back to using a pair of kettle cables, which is probably more appropriate for Quad 909 monoblocks (whose founder P J Walker famously said a good audio cable is one that conducts electricity).
That leaves me with the 3 regenerated supplies - so one to the valve phono stage, one to the PWD Mk2 DAC and one for a block for everything else.